Wireshark · Wireshark-users: Re: [Wireshark-users] 2 IP addresses on 1 machine

[Juan Perez <jperezsip2008@xxxxxxxxx>]

anybody has experienced this prob? any ideas on how to solve it?
any help would be very much appreciated, thanks

jp



----- Original Message ----
From: Juan Perez <jperezsip2008@xxxxxxxxx>
To: Community support list for Wireshark <wireshark-users@xxxxxxxxxxxxx>
Sent: Friday, April 17, 2009 4:27:43 PM
Subject: Re: [Wireshark-users] 2 IP addresses on 1 machine


ok, what happens is that I am using pub IPs and can not show them here. I had to edit the output of the "ifcfg-ethX" files and of course I messed up 2 times, :-(.
this should be the right information, sorry again.


eth1 --> 192.168.1.10 255.255.255.0
eth2 --> 192.168.1.11 255.255.255.0


[root@proxy2 network-scripts]# cat ifcfg-eth1
# Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet
DEVICE=eth1
BOOTPROTO=none
BROADCAST=192.168.1.255
HWADDR=00:19:b9:f2:f3:f4
IPADDR=192.168.1.10
NETMASK=255.255.255.0
NETWORK=192.168.1.0
ONBOOT=yes
GATEWAY=192.168.1.1
TYPE=Ethernet
[root@proxy2 network-scripts]# 

[root@proxy2 network-scripts]# cat ifcfg-eth2
# Intel Corporation 82546EB Gigabit Ethernet Controller (Copper)
DEVICE=eth2
ONBOOT=yes
BOOTPROTO=none
HWADDR=00:04:23:e6:8b:17
NETMASK=255.255.255.0
IPADDR=192.168.1.11
GATEWAY=192.168.1.1
TYPE=Ethernet
NETWORK=192.168.1.0
BROADCAST=192.168.1.255
[root@proxy2 network-scripts]# 





----- Original Message ----
From: Jaap Keuter <jaap.keuter@xxxxxxxxx>
To: Community support list for Wireshark <wireshark-users@xxxxxxxxxxxxx>
Sent: Friday, April 17, 2009 1:52:41 PM
Subject: Re: [Wireshark-users] 2 IP addresses on 1 machine

Hi,

Your config says differently:

<quote>
  [root@proxy2 network-scripts]# cat ifcfg-eth0
  # Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet
  DEVICE=eth0
  BOOTPROTO=none
  BROADCAST=192.168.1.255
  HWADDR=00:19:b9:f2:f3:f4
  IPADDR=192.168.1.10
  NETMASK=255.255.255.0
  NETWORK=192.168.1.0
  ONBOOT=yes
  GATEWAY=192.168.1.1
  TYPE=Ethernet
</quote>

Thanx,
Jaap

Juan Perez wrote:
> sorry, I was a mistake, it is eth1 and eth2, the question still remains ;-)
> 
> eth1 -> IP=192.168.1.10/24
> eth2 -> IP=192.168.1.11/24
> 
> 
> cheers
> 
> jp
> 
> 
> ----- Original Message ----
> From: Jaap Keuter <jaap.keuter@xxxxxxxxx>
> To: Community support list for Wireshark <wireshark-users@xxxxxxxxxxxxx>
> Sent: Friday, April 17, 2009 1:22:43 PM
> Subject: Re: [Wireshark-users] 2 IP addresses on 1 machine
> 
> Hi,
> 
> Reading from the configuration data, in short:
> 
> eth0 -> IP=192.168.1.10/24
> eth1 -> IP=192.168.1.11/24
> 
> So, there is not eth2 in this list. The command line "tshark -i eth1" to capture 
>   traffic to 192.168.1.11 is perfectly oke.
> 
> Thanx,
> Jaap
> 
> Juan Perez wrote:
>> Hello
>>
>> I have a linux machine with two physical NICs and each NIC has its own IP address belonging to the same network.
>> Example: 
>> eth0 --> 192.168.1.10 255.255.255.0
>> eth1 --> 192.168.1.11 255.255.255.0
>>
>>
>> [root@proxy2 network-scripts]# cat ifcfg-eth0
>> # Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet
>> DEVICE=eth0
>> BOOTPROTO=none
>> BROADCAST=192.168.1.255
>> HWADDR=00:19:b9:f2:f3:f4
>> IPADDR=192.168.1.10
>> NETMASK=255.255.255.0
>> NETWORK=192.168.1.0
>> ONBOOT=yes
>> GATEWAY=192.168.1.1
>> TYPE=Ethernet
>> [root@proxy2 network-scripts]# 
>>
>> [root@proxy2 network-scripts]# cat ifcfg-eth1
>> # Intel Corporation 82546EB Gigabit Ethernet Controller (Copper)
>> DEVICE=eth1
>> ONBOOT=yes
>> BOOTPROTO=none
>> HWADDR=00:04:23:e6:8b:17
>> NETMASK=255.255.255.0
>> IPADDR=192.168.1.11
>> GATEWAY=192.168.1.1
>> TYPE=Ethernet
>> NETWORK=192.168.1.0
>> BROADCAST=192.168.1.255
>> [root@proxy2 network-scripts]# 
>>
>> I have 2 apps, each one listen on 1 IP:
>>
>> app 1 listens only on 192.168.1.10 
>> app 2 listens only on 192.168.1.11. 
>>
>> When I run tshark this way "tshark -i eth2 -S" and packets destined to IP 2  arrive I do no see them, I have to run tshark like this: "tshark -i eth1 -S".
>> In summary, I have to run "tshark -i eth1" for me to see the packets that fo to IP 2. When I do it that way I can see the packets from any ext IP to the IP 2 192.168.1.11.
>>
>> This should not be. Is there anything wrong with my NICs configuration?
>>
>> cheers
>>
>> jp
>>
>>

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